Belgium is on high alert following a string of terrorist attacks over the past year.

A man armed with a knife and shouting “Allahu Akbar!” launched himself at two policewomen on August 6 in the city of Charleroi. The perpetrator, who inflicted serious facial wounds upon one of his targets, was then fatally shot.

The deadliest attack happened in March, when five suicide bombers, who had pledged allegiance to Islamic State detonated nail bombs in Brussels Airport and a train station in the capital. Thirty-two victims were killed in the attacks.

The immigrant-populated Brussels district of Molenbeek has also been pinpointed as the heart of Europe’s Islamist terrorist activity, after it was used as a recruiting center for IS jihadists, and the base from which last year’s November attacks in Paris were plotted.